Determination method and application of hydrogen sulfide content in methanol solution

Abstract

The invention discloses a measurement method for hydrogen sulfide content of a methanol solution and application of the measurement method. The measurement method comprises the following steps of constructing an absorbancy-hydrogen sulfide content standard curve; preparing a methanol solution to be measured into a sample to be measured; testing the sample to be measured through a spectrophotometer to obtain an absorbancy value of the sample to be measured; and obtaining a hydrogen sulfide content of the sample to be measured from the absorbancy-hydrogen sulfide content standard curve according to the measured absorbancy value. The hydrogen sulfide content of the methanol solution can be obtained by constructing the absorbancy-hydrogen sulfide content standard curve, preparing the methanol solution to be measured into the sample to be measured, measuring the absorbancy value of the sample to be measured and obtaining the result. The method is applied to liquid in actual production, so that the hydrogen sulfide content of a 'rectisol' solution can be measured accurately and conveniently, and therefore, the deficiency of the methanol solution can be determined, and the absorption capacity of the methanol solution in a purification process is guaranteed.

Description

technical field [0001] The invention relates to the technical field of chemical quantitative determination, in particular to a method for determining the content of hydrogen sulfide in methanol solution and its application. Background technique [0002] In the industrial production of coal-to-methanol, coal is gasified and transformed to produce process reaction gas. Due to the simultaneous presence of multiple complex elements in coal, a large amount of hydrogen sulfide is often produced during the gasification process of coal. Hydrogen sulfide is a major harmful substance in the synthesis of methanol from coal. It can poison the copper-based catalyst in the synthesis reaction, seriously affect the service life of the catalyst, and lead to production termination in severe cases. Therefore, in the industrial production of methanol, the shift gas must be purified before entering the synthesis tower to remove sulfides in the reaction gas. [0003] At present, in the industria...

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Problems solved by technology

However, there are not many relevant reports about the determination method of hydrogen sulfide content in the regenerated methanol solution in industrial production at present. In actual production, some use instrumental analysis method, but the price of the instruments and equipment adopted is relatively expensive, and it is difficult to popularize and use

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